News tagged with sex
A post-coital switch: Mapping the changing behaviors in the female fruit fly's mind
If men are from Mars and women are from Venus, then it shouldn't be surprising that their neural circuits differ. In research published today in the journal Current Biology, researchers have used dramatic change ...
May 31, 2012 |
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Female sex offenders protected by the criminal justice system
Female sex offenders receive lighter sentences for the same crimes than males says a study recently published in Feminist Criminology, a SAGE journal and the official journal of the Division on Women and Crime of the Americ ...
Other Sciences / Social Sciences
May 30, 2012 |
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Sex: it's a good thing, evolutionarily speaking
(Phys.org) -- Sure, sex may be fun, but it’s a lot of work, and the payoff is by no means certain. Scientists have speculated for a long time on why all living things don’t simply make like amoebas ...
May 30, 2012 |
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Viewers' family background affects how they react to MTV shows 16 and Pregnant, Teen Mom
Two popular MTV programs about teenage pregnancy -- "16 and Pregnant" and "Teen Mom" -- were met with national debate. Critics said the shows glamorized teenage pregnancy, while supporters said they discouraged it.
Other Sciences / Social Sciences
May 22, 2012 |
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Australia warns of 'bespoke' online child sex abuse
Australian police warned Thursday that paedophiles were using Internet live-streaming sites to order "bespoke" child sex crimes for real-time viewing, from countries including the Philippines.
May 17, 2012 |
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Not only humans compensate: Dosage compensation of sex chromosomes in plants
Swiss researchers have found evidence that plants also "invented" the dosage compensation of sex chromosomes. They detected this phenomenon in the white campion.
May 16, 2012 |
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Men can rest easy -- sex chromosomes are here to stay
Fears that sex-linked chromosomes, such as the male Y chromosome, are doomed to extinction have been refuted in a new genetic study which examines the sex chromosomes of chickens.
May 08, 2012 |
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Early spring means more bat girls
There must be something in the warm breeze. A study on bats by a University of Calgary researcher suggests that bats produce twice as many female babies as male ones in years when spring comes early.
May 05, 2012 |
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Biologists turn back the clock to understand evolution of sex differences
Sex differences account for some of the most of the spectacular traits in nature: the wild colours of male guppies, the plumage of peacocks, tusks on walruses and antlers on moose. Sexual conflict – the ...
May 03, 2012 |
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Online predators still loom charge, new research warns
Results from a three-year EU-funded study into the methods and behaviours of sex offenders show that online paedophiles who seek out children in chat rooms are abandoning the traditional 'grooming process'; ...
Apr 19, 2012 |
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Adam's rib, revisited: Evolutionary divergence of mammalian sex chromosomes
(Phys.org) -- Males and females... Mars and Venus... XY and XX chromosomes -- all are common memes. At the same time, the evolution of therian (placental and marsupial) sex chromosomes is less widely understood. ...
Apr 18, 2012 |
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Promiscuous queen bees maintain genetic diversity
By mating with nearly 100 males, queen bees on isolated islands avoid inbreeding and keep colonies healthy.
Apr 16, 2012 |
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Sex offenders booted from videogame playgrounds
New York State's top prosecutor on Thursday announced that thousands of sex offenders have been kicked out of online playgrounds popular with young videogame lovers.
Apr 05, 2012 |
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Research shows entrepreneurial differences between the sexes
A study of the sexes reveals that when it comes to starting a business, women are more likely than men to consider individual responsibility and use business as a vehicle for social and environmental change.
Other Sciences / Economics & Business
Apr 03, 2012 |
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Sex-offender registries in five states inflate counts by 43 percent
Do an online search for sex offenders living in your neighborhood and you may be alarmed by how many you find. But a new study of sex-offender registries in five states shows that they overestimate the number of offenders ...
Other Sciences / Social Sciences
Apr 02, 2012 |
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Sex
In biology, sex is a process of combining and mixing genetic traits, often resulting in the specialization of organisms into male and female types (or sexes). Sexual reproduction involves combining specialized cells (gametes) to form offspring that inherit traits from both parents. Gametes can be identical in form and function (known as isogametes), but in many cases an asymmetry has evolved such that two sex-specific types of gametes (heterogametes) exist: male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism.
An organism's sex is defined by the gametes it produces: males produce male gametes (spermatozoa, or sperm) while females produce female gametes (ova, or egg cells); individual organisms which produce both male and female gametes are termed hermaphroditic. Frequently, physical differences are associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience.
For more information about Sex, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
